Ontario Mineral Inventory

Ontario Geological Survey
Permanent Link to this Record: MDI42C02NW00026

Record: MDI42C02NW00026

General

Commodities

Primary Commodities: Diamond

Location

Township or Area: Menzies

Latitude: 48° 10' 47.92"    Longitude: -84° 50' 4.1"

UTM Zone: 16    Easting: 660971.86   Northing: 5338571.74    UTM Datum: NAD83

Resident Geologist District: Sault Ste. Marie

NTS Grid: 42C02NW

Point Location Description: Outcrop on the west side of Trans Canada Highway

Location Method: Field Visit with GPS

Access Description: Drive north along Highway 17 from the junction of highway 101 for a distance of approximately 28 km. The occurrence outcrops on the west side of the highway.

Exploration History

1995-96: Sandor Surmacz - prospecting, sampling. 1997: Spider Resources Ltd. - sampling.

Geology

Province: Superior

Subprovince: Wawa

Terrane: Wawa-Abitibi

Belt: Michipicoten

Tectonic Assemblage: Wawa

Geological Age: Neoarchean   Geochronological Age: 2750 MA   Geochron. Age Ref.: GOO VOL 1

Metamorphism Type: Regional

Metamorphism Grade: Greenschist

Geology Comments

Dec 07, 2005 (A Wilson) - The diamond occurrences appear to be restricted to a D1 recumbent nappe in the west-central portion of the Michipicoten greenstone belt. The nappe is imbricated by south-vergin reverse faults. The direction of nappe transport is from south to north and it lies immediately north and adjacent to the Kapuskasing Structural Zone. This thrusting and shortening may be related to the tectonic events along the Kapuskasing Structural Zone. The western limit of the nappe is likely the Dickenson Lake fault that passes to the west of the Dickenson Lake stock. The nappe is not likely to extend east beyond the Marsden Fault.

Lithology

Lithology Comments

Dec 07, 2005 (A Wilson) - The dike contains 10% actinolite xenoliths and a minor amount of supracrustal fragments. The dike is hosted by a diatreme or breccia composed of 95% angular fragments of agglomeratic felsic tuff and 5% very fine-grained mafic matrix. The dike contains 10% well-rounded oblate actinolite xenoliths with thin reactions rims.

Mineralization

Mineralization Comments

Dec 07, 2005 (A Wilson) - A 28.3 kg sample collected by Spider Resources yielded 6 microdiamonds, 1 macrodiamond and 3 commercial stones. A larger 164.7 kg sample of the dike returned 81 microdiamonds, 11 macordiamonds and 3 commercial stones. Most of the diamonds were described as yellowe, transparent fragments, however a few octahedrons and cubes also were reported.

Mineral Record Details

Mineral Zones - Size and Shape

Rank: 1       Structure Type: None

References

File - Resident Geologist files WP.Lalibert.2

Publication Number: Date:

Author:

Publisher Name:

Location: SSM RGP office

Map - Manitouwadge-Wawa sheet, geological compilation series, Algoma, Cochrane, Sudbury and Thunder Bay districts

Publication Number: M2220 Scale: 1:253,440    Date: 1972

Author: Milne V.G., Giblin P.E., Bennett G., Thurston P.C., Wolfe W.J., Giguere J.F., Leahy E.J., Rupert R.J.

Publisher Name: Ontario Division of Mines

Location:

File - Spider Resources Ltd - press releases

Publication Number: Clippings Date: 1997

Author:

Publisher Name:

Location: SSM RGP office

Map - Precambrian Geology Compilation Series - White River Sheet

Publication Number: M2666 Scale: 1:250,000    Date: 2001

Author: Santaguida F.

Publisher Name: Ontario Geological Survey

Location:

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Ministry Contact Information

For detailed information regarding this mineral record please contact the Sault Ste. Marie Resident Geologist District Office